Portable ladder.



PATENTEDi NOV. '22, 1904.

M. TETZLAFF.

PORTABLE LADDER.

APPLICATION FILED MAR. 10, 1904 i'atented. November 22, i904.

FFIC'E.

MAX TETZLAFF, OF PR. STARGARD, GERMANY.

PORTABLE LADDER.

SPECIFICATION formingpart of Letters Patent No. 775,488, dated November22, 1904.

Application filed March 10, 1904.

T0 ItZZ whom zit may concern.-

Be it known that I, MAX TETZLAFF, a citizen of the German Empire,residing at Pr.

Stargard, Germany, have invented certain new and useful Improvements inand Connected with Portable Ladders, of which the following is aspecification, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention refers to improvements in and connected with ladders,being especially applicable to those used in shops, warehouses, and thelike.

Ladders constructed according to my invention are so arranged that theycan be easily moved from place to place within certain limitsirrespective of their weight. The ladder is supported by a rod hangingon rollers which run on rails. At its highest position the ladder isheld hanging from the rod and can be easily moved on the rails. If theladder is pulled down, it assumes an oblique 0r slanting position, itslower end resting on the floor and its upper end supported through theintermediary of the rod by the rollers and rails.

I will now describe my invention, with reference to the accompanyingdrawings, in Which Figure 1 shows in elevation a simple form of myimproved ladder in its highest position. Fig. 2 shows in elevation aside view of the ladder shown in Fig. 1 in the slanting positionrequired for mounting. Fig. 3shows, mostly in section, the rod, rollers,and rails at the upper end of the ladder. Fig. 4 is a side View of Fig.3. Fig. 5 is a section of Fig. 3 on the line A B. Fig. 6 is a section ofFig. 8011 the line C D.

Two guide-rods e f with longitudinal slots 0 (Z are fitted to andprolong the upper ends of the sides a bof the ladder. A cross-piece k,fitted to and turning freely on the lower end of the rod '5, hasprojecting studs or bolts g IL, which engage in the slots 0 ti. Thiscross-piece is can form one with or be firmly connected to theguide-rods ef, in which case the bolt c' would slide in the cross-pieceis. -The guide-rods e f are united at their upper Serial No. 197,439.(No model.)

Two rollers q r are fitted to the upper end of the rodc' and run onrails s, fitted to the ceiling in any suitable place.

Now if the ladder-is so turned that the bolt or stud .p can pass throughthe incisions n 0 of the hole at, then the ladder can be pushed up sothat the cross-piece Z passes over the stud 2', as shown in Fig. 3. Ifthe ladder is now turned at right angles, the stud p, engaging with thecross-piece Z, holds the ladder in the raised-up position, as shown inFig. 1, so that it can thus be easily rolled from place to place. If itis required to place the ladder in position for using, it has only to beturned again at right angles and allowed to drop until it touches thefloor.

The length of the rodc' and the slots 0 d render it possible to give therequired slant to the ladder, as shown in Fig. 2. In this position thestuds or bolts 9 it, formed on the lower cross piece k, engage with theupper end of the slots 0 OZ, and thus in the slanting position of thelatter limit the forward movement of the rollers q a" on the rails s andat the same time securely support the upper end of the ladder.

In case the rails s for some reason or other have to be placed someconsiderable distance from the ceiling-a pin or stud t can be providedso as to prevent the rollers q 1 being raised up at the same time as theladder.

What I claim, and desire to secure by Letters Patent, is v A movableladder for stores, warehouses and the like, having at the top end twoslotted bars 6 f, connected at the upper end by a slotted cross-piece Z,in combination with a rod 71 and with rollers 9 running on a cross-pin,secured in the head of the rod 2' and moving along in guides under theceiling, said rod 2' passing through the slot of the cross-piece Z andcarrying'a cross-pin 37 adapted to pass through the slotted cross-pieceZ in one position and to rest upon the same in a position at right InWitness whereof I have hereunto set my angles thereto When the ladder isturned hand in presence of two Witnesses.

through ninety degrees, and said rod 91 carrying at its lower end across-head 7:? adapted to MAX TETZLAFF 5 slide in the slots of the bars6 and f substan- Witnesses:

tially as described and for the purpose set VVOLDEMAR HAUPT,

forth. HENRY HASPER.

